Does cheese give you weird dreams?

It's a question that may have grated on you for sometime, does too much cheese give you weird dreams? According to new research, yes it does, but not just any dreams, nightmares. An online survey of more than a thousand students at Canada's MacEwan University found a strong association between bad dreams and lactose intolerance, potentially because gas or stomach pain during the night affects people's dreams. Director at Montreal's Dream & Nightmare Lab at the Center for Advanced Research in Sleep Medicine Dr Tore Nielsen spoke to Lisa Owen.